Python lines beginning with '@'?

Question

Possible Duplicate:
What does @ mean in Python?

Here is the code I don't understand:

def coroutine(func):
   def start(*args,**kwargs):
      cr = func(*args, **kwargs)
       #cr.next()
       next(cr)
       return cr
   return start

@coroutine #<<<----- HERE
def detectChange(value):
   old_value = value
    while True:
       new_value = (yield)
       if new_value != old_value:
          print ("Ouch!")
          old_value = new_value

What does the @coroutine means syntax wise?

You should also post real code. This code has invalid indentation. Use copy/paste. — David Heffernan, Mar 08 '12 at 18:52

score 1 · Accepted Answer · answered Mar 08 '12 at 18:49

1

It's a function decorator.

answered Mar 08 '12 at 18:49

Danica

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score 0 · Answer 2 · answered Mar 08 '12 at 18:49

0

It's a decorator: http://www.artima.com/weblogs/viewpost.jsp?thread=240808

answered Mar 08 '12 at 18:49

Tim McLean

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score 0 · Answer 3 · answered Mar 08 '12 at 18:50

0

Decorators wrap functions: http://wiki.python.org/moin/PythonDecorators

answered Mar 08 '12 at 18:50

Marcin

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Python lines beginning with '@'?

3 Answers3